Trend 2SRM
The Trend 2SRM is a two single relays module that can be used for a variety of applications, including:
- Controlling HVAC equipment
- Switching lights
- Opening and closing doors
- Starting and stopping motors
The 2SRM has two independent relays, each of which can be controlled by a separate input. The inputs can be either digital or analog, and the relays can be configured to operate in a variety of modes, including:
- On/off
- Auto/on/off
- High/raise
- Low/lower
The 2SRM also has a number of features that make it easy to install and use, including:
- DIN rail mounting
- Screw terminals for easy wiring
Trend 2SRM
The Trend 2SRM is a two single relays module that can be used for a variety of applications, including:
- Controlling HVAC equipment
- Switching lights
- Opening and closing doors
- Starting and stopping motors
The 2SRM has two independent relays, each of which can be controlled by a separate input. The inputs can be either digital or analog, and the relays can be configured to operate in a variety of modes, including:
- On/off
- Auto/on/off
- High/raise
- Low/lower
The 2SRM also has a number of features that make it easy to install and use, including:
- DIN rail mounting
- Screw terminals for easy wiring
2SRM (24 Vac/dc) Installation Instructions TG103210 Issue 2 07/07/08
1
Installation Instructions
2SRM (24 Vac/dc)
Two Single Relays Module
Important: Retain these instructions
c
Dimensions
3 Installation
1
Requirements
2
1 Unpacking
2SRM (24 Vac/dc)
Installation Instruction
TG103210
H O
2
-10 °C
(14 °F)
+70 °C
(158 °F)
0 %RH
95 %RH
2 Storage
It is recommended that the installation
should comply with the HSE
Memorandum of Guidance on Electricity
at Work Regulations 1989.
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NC NO C NC NO C
IN
2
IN
1
RL1
RL2
57 mm (2.24”)
48 mm (1.89”)
83 mm (3.23”)
13 mm
(0.51”)
IN
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NO NC C NO NC C
IN
2
IN 0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NO NC C NO NC C
IN
2
a
-10 °C
(14 °F)
IN 0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NO NC C NO NC C
IN
2
+50 °C
(122 °F)
H O
2
0 %RH 90 %RH
b
IN
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NO NC C NO NC C
IN
2
2SRM (24 Vac/dc) Installation Instructions
2SRM (24 Vac/dc) Installation Instructions TG103210 Issue 2 07/07/08
2
O F F
A U T O
O N
A U T O O N
O F F
Mount on DIN rail
3
ab
c
Set AUTO/ON/OFF links to
AUTO
4
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NC NO C NC NO C
IN
2
IN
1
RL1
RL2
A U T O O N O F F
Link for Channel 1
(Low/Lower relay)
Link for Channel 2
(High/Raise relay
Note that each link may
be replaced by a three
position (SPDT) switch
which will normally be
centre off; this would be
wired as adjacent
diagram (see note
step 13).
Switch off IQ
5
1 2 3 4 5 6 7 8 9 1 0
A
B
C
D
D P
T X R X
O K
L A N
1
2 3 4 5
6 7 8
9 1 0
1 1
1 2
1 3
1 4
1 5
V
2 4 V
1 6
1 7
1 8
1 9
2 0
O
I
IQ
Ensure IQ Output channels
are Analogue set to Voltage V
6
0 V
OUT 2
0 V
OUT 1
IQ
IQ Controller
Installation
Instructions
V
V
3 Installation (continued)
Wire module to controller
7
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NC NO C NC NO C
IN
2
IN
1
RL1
RL2
IQ
2SRM
Terminal size 0.5 to 2.5 mm
2
(14 to 20 AWG)
IQ
2SRM
0 V
OUT 2
0 V
OUT 1
24 V
IN 2
0 V
IN 1
24 Vac/dc
PSU
or using external
24 Vac/dc supply
either using IQ
24 Vdc Auxiliary
Supply
24 V
0 V
OUT 2
0 V
OUT 1
24 V
IN 2
0 V
IN 1
maximum current consumed from supply:
24 Vac 73 mA, 24 Vdc 33 mA
Note that external 24 V supply should be isolated or earthed (grounded) at IQ earth (ground); ensure correct polarity
2SRM (24 Vac/dc) Installation Instructions TG103210 Issue 2 07/07/08
3
Installation Instructions 2SRM (24 Vac/dc)
3 Installation (continued)
Ensure HVAC Equipment Power
Supplies are Switched off
8
O
I
O
I
2SRM
HVAC
Equipment
2
Supply
WARNING: The wires may be connected
to hazardous voltages.
Disconnect power before
attempting any wiring.
Arc suppression
recommended
Relay Output Arc
Suppression Installation
Instructions TG200208
Terminal size 0.5 to 2.5 mm
2
(14 to 20 AWG)
Supply
C
NO
NC
Connect module to HVAC
equipment
9
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NC NO C NC NO C
IN
2
IN
1
RL1
RL2
2SRM
C
NO
NC
C
NO
NC
Supply
C
NO
NC
Supply
Channel 2
OUT
Channel 1
OUT
Channel 2
OUT
Channel 1
OUT
HVAC
Equip-
ment
2
Contacts rated 5 A max. at 240 Vac single
phase only (Cosø>=0.4), and 30 Vdc (resistive
load). 2 A for 24 Vdc (inductive load,
T<=30ms).
Close panel
10
Switch on IQ
11
IN 0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NO NC C NO NC C
IN
2
1 2 3 4 5 6 7 8 9 1 0
A
B
C
D
D P
T X R X
O K
L A N
1
2 3 4 5
6 7 8
9 1 0
1 1
1 2
1 3
1 4
1 5
V
2 4 V
1 6
1 7
1 8
1 9
2 0
O
I
IQ
HVAC
Equipment
1
HVAC
Equip-
ment
1
2SRM (24 Vac/dc) Installation Instructions
2SRM (24 Vac/dc) Installation Instructions TG103210 Issue 2 07/07/08
4
Trend Control Systems Limited
P.O. Box 34, Horsham, West Sussex, RH12 2YF, UK. Tel:+44 (0)1403 21888 Fax:+44 (0)1403 241608 www.trend-controls.com
Trend Control Systems USA
6670 185th Avenue NE, Redmond, Washington 98052, USA. Tel: (425)897-3900, Fax: (425)869-8445 www.trend-controls.com
Please send any comments about this or any other Trend technical publication to [email protected]
© 2008 Honeywell Technologies Sàrl, ECC Divison. All rights reserved. Manufactured for and on behalf of the Environmental and Combustion Controls
Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative, Trend Control Systems Ltd.
Trend Control Systems Limited reserves the right to revise this publication from time to time and make changes to the content hereof
without obligation to notify any person of such revisions or changes.
3 Installation (continued)
WEEE Directive :
At the end of their useful life the packaging
and product should be disposed of by a
suitable recycling centre.
Do not dispose of with normal household waste.
Do not burn.
O
I
O
I
Switch on HVAC Equipment Power supplies
12
2SRM
Supply
Supply
C
NO
NC
C
NO
NC
Channel 2
OUT
Channel 1
OUT
12345678910
A
B
C
D
DP
TX RX
OK
LAN
1
234 5
67 8
910
11
12
13
14
15
V
24V
16
17
18
19
20
0V
24
V
AUTO ON OFF AUTO ON OFF
J1J2
LOW/LOWER
HIGH/RAISE
NC NO C NC NO C
IN
2
IN
1
RL1
RL1
IQ
‘click’
Check Relay operation
13
2SRM
Note that the AUTO/ON/OFF links may be used to test 2SRM to plant installation, however, when
using manual overrides (ON, OFF), feeds switched from other relays on the same module, or
interlocks with other relays may not be operative.
Channel 2
‘click’
Channel 1
4 Disposal
HVAC
Equipment
2
HVAC
Equipment
1
HVAC
Equipment 2
HVAC
Equipment 1
-
1
-
2
-
3
-
4
Trend 2SRM
The Trend 2SRM is a two single relays module that can be used for a variety of applications, including:
- Controlling HVAC equipment
- Switching lights
- Opening and closing doors
- Starting and stopping motors
The 2SRM has two independent relays, each of which can be controlled by a separate input. The inputs can be either digital or analog, and the relays can be configured to operate in a variety of modes, including:
- On/off
- Auto/on/off
- High/raise
- Low/lower
The 2SRM also has a number of features that make it easy to install and use, including:
- DIN rail mounting
- Screw terminals for easy wiring
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